Not sure about 30D...since I am not a canon user, but : i, M# L" U' ^4 h, ]! U0 y ; _6 q3 E- D) X& c- Y X5 D3 B2 ~For most of the Cameras, this sound is simulated, and it can be turned off in setting manu.../ J$ g( \( S: U4 Y& G4 D
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The shutter and reflective lense sound seldom as loud as what you hear. If yes, they would be damaged very soon.